Lifting-jack.



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CORD BREDEI-IOFT, OF RUBY, NORTH DAKOTA.

LlFTiNG JACK.

SEEGIEICATIQN forming part of Letters Patent No. 676,977 dated June 25,1 9011.

Application filed April 11. 1901. Serial No. 55,364. (No model.)

To ctZZ whom it may concern:

Be it known that 1, Com) Bnnonnorr, a citizen of the United States,residing at Ru by, in the county of Nelson and State of North Dakota,have invented certain new and useful Improvements in Lifting-Jacks; andIdo declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention relates to lifting-jacks.

The object of the invention is to simplify and improve the constructionshown in Letters Patent No. 666,643, granted to me January 29, 1901,whereby the device is rendered more efficient in action, durable in use,and its cost of production materially reduced.

With this and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,which will be hereinafter more fully described, and particularly pointedout in the appended claims.

In the accompanying drawings, Figure 1 is a perspective view of myimproved liftingjack. Fig. 2 is a crosssectional view through the lowerend of the guide-bracket, the lifting-rod, supporting-standards, andlink-connecting bolt. Fig. 3 is a detail perspective view of theguide-bracket, and Fig. 1 is a cross-sectional view through the base andlower ends of the supporting-standards.

In the drawings, 1 denotes the supportingbase, which consistsof a flatring 2 and a box 3 connected thereto by ribs 4, all of which are cast inone piece. 7

, 5 denotes the supporting-standards, the lower ends of which areinserted in the box and are secured in place by bolts 7.

8 denotes a guide-bracket consisting of two alined lugs 9, connectedtogether by a vertical piece 10 and formed with registering apertures11. The vertical piece 10 has at its upper end two rearwardy-projectingears 12, which span the upper ends of the standards and are boltedthereto by short bolts 13, while the lower end of the vertical piece hasa laterally-projecting bifurcated lug 1a, which projects between the twostandards and serves to space them apart and is secured to the standardsby a connecting-bolt 15.

18 denotes a lever pivoted at its inner end to the lifting-rod, and 19denotes a link pivoted to the said leveraud between the bifurcatedmembers of the lug, on the connectingbolt-15.

From this construction it will be apparent that the lug, whilepreventing the collapsing of thestandards, or, more properly speaking,their movement inward toward each other, also serves to provide meansfor steadying the link and preventing it from Wabbling on theconnecting-bolt 15, While the ears 12 serve to prevent the spreading ofthe upper ends of the standards, thus producing a strong, durablelifting-jack.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, mode of operation, andadvantages of my invention will be readily understood without requiringa more extended explanation.

Various changes in the form, proportion, and details of construction maybe made within the scope of the invention without departing from thespirit or sacrificing any of the advantages thereof.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a lifting-jack, the combination with a supporting-base, ofvertical standards connected thereto, a guide-bracket having cars whichspan the upper ends of said standards, a lug which projects between saidstandards, a bolt for connecting the lugs to said standards, bolts forconnecting the ears to said standards, a lifting-rod, and a suitablyfulcrumed lever connected to the lifting-rod, substantially as setforth.

2. In a lifting-jack, the combination with a supporting-base, ofstandards connected thereto, a guide-bracket provided with alinedapertures and having at its upper end ears which span the upper ends ofsaid standards and at its lower end a bifurcated lug which projectsbetween said standards, a bolt for securing the ears and the lug to saidstandards, a lifting-rod mounted to slide in the ap erture's of saidbracket, a link pivoted bemy hand. in presence of two subscribingwittween thellloiflilircated members of said lug on nesses. the bolt Wic connects the lug to said stand- W ards, and an operating-leverpivoted to the CORD BREDEHOFT' 5 lifting-rod and to the upper end of thelink, WVitnesses:

substantially as set forth. '1. O. FAVREAU, In testimony whereof I havehereunto set A. I. WILSON.

